html, body, #app {
    height: 100%;
    margin: 0;
    padding: 0;
    min-width: 1366px;
}

.flex {
    display: flex;
}

.flexVvcenter {
    display: flex;
    align-items: center;
}

.flexCenter {
    display: flex;
    justify-content: center;
    align-items: center;
}

.fz18 {
    font-size: 18px;
}

.fz20 {
    font-size: 20px;
}

.fz24 {
    font-size: 24px;
}

.white {
    color: #fff;
}